Issue with Oceans and Aquatic Update

I logged into my minecraft realm world to enjoy the new aquatic update phase one.  These are the issues I am seeing:

1)  Double doors (doors places side by side) do not have the handles facing the middle, but instead show the hinges on the left and handles on the right, even though the doors open as they should (like proper french doors, left opening to the left and the right opening to the right).

2)  While the fish and dolphins have spawned and are seemingly acting right, the ocean/water areas that I have previously explored have no sea weed, grass, cucumber, or coral.  They also have no caves, trenches, or shipwrecks.  It seems that all previously explored areas have not updated to this update, except with animal spawns.  I proved this by hiking 5 map tiles away where I have not previously explored and finally found the aquatic update in its glory.

So basically my water areas (oceans) are the original look with gravel bottoms and nothing else.

My world is a Xbox360 transferred to Xbox one edition, uploaded into bedrock Mojang edition world that I have spent multiple years on and have gone too far to restart from nothing (pure, uninterrupted survival world).  I would like to see the aquatic update come closer to my world, other than hiking two days away to see underwater beauty.